8040529561 has 3 divisors (see below), whose sum is σ = 8040619231. Its totient is φ = 8040439892.

The previous prime is 8040529547. The next prime is 8040529579. The reversal of 8040529561 is 1659250408.

The square root of 8040529561 is 89669.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 2267569161 + 5772960400 = 47619^2 + 75980^2 .

It is not a de Polignac number, because 8040529561 - 2¹¹ = 8040527513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8040529591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 44835 + ... + 134503.

Almost surely, 2^8040529561 is an apocalyptic number.

8040529561 is the 89669-th square number.

8040529561 is the 44835-th centered octagonal number.

It is an amenable number.

8040529561 is a deficient number, since it is larger than the sum of its proper divisors (89670).

8040529561 is an frugal number, since it uses more digits than its factorization.

8040529561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179338 (or 89669 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 40.

The cubic root of 8040529561 is about 2003.3717757862.

Adding to 8040529561 its reverse (1659250408), we get a palindrome (9699779969).

The spelling of 8040529561 in words is "eight billion, forty million, five hundred twenty-nine thousand, five hundred sixty-one".